LU-14642 flr: allow layout version update from client/MDS

[fs/lustre-release.git] / lustre / include / uapi / linux / lustre / lustre_user.h

diff --git a/lustre/include/uapi/linux/lustre/lustre_user.h b/lustre/include/uapi/linux/lustre/lustre_user.h
index edeff5a..341176f 100644 (file)
--- a/lustre/include/uapi/linux/lustre/lustre_user.h
+++ b/lustre/include/uapi/linux/lustre/lustre_user.h
@@ -889,10 +889,6 @@ enum lov_comp_md_entry_flags {
 #define LCME_TEMPLATE_FLAGS    (LCME_FL_PREF_RW | LCME_FL_NOSYNC | \
                                 LCME_FL_EXTENSION)
 
-/* the highest bit in obdo::o_layout_version is used to mark if the file is
- * being resynced. */
-#define LU_LAYOUT_RESYNC       LCME_FL_NEG
-
 /* lcme_id can be specified as certain flags, and the the first
  * bit of lcme_id is used to indicate that the ID is representing
  * certain LCME_FL_* but not a real ID. Which implies we can have
@@ -904,6 +900,16 @@ enum lcme_id {
        LCME_ID_NOT_ID  = LCME_FL_NEG
 };
 
+/* layout version equals to lcme_id, except some bits have special meanings */
+enum layout_version_flags {
+       /* layout version reaches the high water mark to be increased to
+        * circularly reuse the smallest value
+        */
+       LU_LAYOUT_HIGEN         = 0x40000000,
+       /* the highest bit is used to mark if the file is being resynced */
+       LU_LAYOUT_RESYNC        = 0x80000000,
+};
+
 #define LCME_ID_MASK   LCME_ID_MAX
 
 struct lov_comp_md_entry_v1 {